Ctrlbus Audio · Harmonic EQ & Channel Strip

RootControl

Mix with Harmonic Precision.

$19.99 $29.99 Intro Price

Apply code LAUNCH at checkout for intro pricing

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RootControl — Harmonic Channel Strip

What it is

EQ that knows your key.
A full chain on every band.

RootControl places your EQ points at the harmonic octaves of your track's root key — then gives you dynamics, compression, saturation, and sidechain on every single band. One plugin. One channel strip. Total harmonic control.

Body
Sub Frequencies
The foundation of your mix. Control sub weight without touching anything above it.
EQ · Saturation
Dyn EQ · Comp
Limiter · Sidechain
Definition
Low Frequencies
The punch. Shape the character of your bass and kick in complete isolation.
EQ · Saturation
Dyn EQ · Comp
Limiter · Sidechain
Color
Low-Mid Frequencies
Warmth and mud. Sculpt tone precisely — add warmth without adding harshness.
EQ · Saturation
Dyn EQ · Comp
Limiter · Sidechain
Presence
Mid Frequencies
Cut through. Control forward presence and intelligibility independently of everything else.
EQ · Saturation
Dyn EQ · Comp
Limiter · Sidechain
Air
Mid-High Frequencies
Openness. M/S routing built in — designed to breathe life into the top end.
EQ · Saturation
Dyn EQ · Comp
Limiter · Sidechain

Root Key Intelligence

Select your Key,
Mix in Harmony.

RootControl sets each band's EQ center frequency to the harmonic octaves of your selected root key. Every cut and boost is musically aligned — no guesswork, no clashing frequencies.

  • EQ points lock to the octaves within your selected key automatically
  • Works across all 12 keys — any track, any genre
  • Combine harmonic awareness with per-band dynamics for mixing that's both musical and surgical
C
C#
D
D#
E
F
F#
G
G#
A
A#
B
Body61.7 Hz
Definition123.5 Hz
Color246.9 Hz
Presence493.9 Hz
Air987.8 Hz

Anti-Key Mode

Suppress the
dissonant frequencies.

Anti-Key places your EQ notches directly on the most dissonant and problematic frequencies for your chosen root note and key. It opens up room in the mix by suppressing the frequencies most likely to clash with your root note and key — without touching anything that belongs.

  • Notches auto-lock to out-of-key pitch classes for your root
  • Works in Major and Minor — pitch targets shift with the mode
  • Combine with the harmonic boost bands for full key-aware control
Anti-Key · C Major
C
C#
D
D#
E
F
F#
G
G#
A
A#
B
Out-of-key notches suppressed
C# / D♭Notch −8 dB
D# / E♭Notch −8 dB
F# / G♭Notch −8 dB
G# / A♭Notch −8 dB
A# / B♭Notch −8 dB

Per-Band Processing

A full channel strip on every band.

01 EQ + Filter Per Band ▾
EQ + Filter module

HPF, Shelf, Bell and LPF with Gain, Q and Saturation. Shape each band with the precision of a dedicated equalizer.

  • Real-time spectrum analyzer with dynamic dB range
  • Zoom in for closer precision on problem frequencies
  • Per-band drag points right on the curve
02 Dynamic EQ Per Band ▾
Dynamic EQ module

Frequency-specific dynamics that respond to the signal. Tame problem frequencies only when they actually appear.

  • Threshold, Range, Attack and Release per band
  • Acts only when the band exceeds threshold
  • Toggle independently from static EQ
03 Compression Per Band ▾
Compression module

Full compressor with Threshold, Ratio, Attack, Release and Makeup gain — per band, independently controlled.

  • Live gain reduction curve visualization
  • Makeup gain compensates automatically
  • Per-band sidechain input optional
04 Saturation Per Band ▾
Saturation module

Five modes — Tube, Tape, OD, Soft, Trans. Add harmonic character and color to any frequency range in isolation.

  • Five distinct saturation algorithms
  • Drive and tone shape per band
  • Harmonics stay in the band you target
05 Limiter Per Band ▾
Limiter module

Per-band brick wall limiting with True Peak detection. Keep each range controlled without touching the others.

  • True Peak readout with inter-sample detection
  • Ceiling and Release per band
  • Independent of the master limiter
06 Sidechain Per Band ▾
Sidechain module

Internal and external sidechain on every band. Duck any frequency range from any source in your session.

  • Internal source or external sidechain input
  • Tempo-synced rhythm patterns (1/4, 1/8, etc.)
  • Mix and Punch shape the ducking response

Technical Specifications

Built for every workflow.

FormatsVST3 · AU
PlatformmacOS · Windows
CompatibilityVST3 / AU hosts
ArchitectureApple Silicon · Intel · x64
Activations2 machines per license
LicensePerpetual · Minor updates free
macOS10.13 High Sierra or later
WindowsWindows 10 or later

Pricing

Get RootControl.

Intro Price — Code LAUNCH
$19.99

Regular price $29.99  ·  Apply code LAUNCH at checkout for intro pricing

Buy RootControl Start Free Trial
  • ✓Perpetual license — yours forever
  • ✓2 machine activations included
  • ✓All minor updates free
  • ✓VST3 and AU included
  • ✓macOS and Windows
  • ✓Works in any VST3 or AU host

FAQ

Questions.

What DAWs does RootControl support?+
RootControl supports VST3 and AU formats and works in major DAWs including Ableton Live, Logic Pro, FL Studio, Cubase, Studio One, and Reaper. We recommend the free trial to verify compatibility with your specific DAW and system configuration.
Do you support Linux?+
Not currently — RootControl is available for Mac and Windows only. We may add Linux support in a future release based on demand.
How many computers can I use it on?+
Each license allows activation on 2 machines simultaneously. You can register additional machines through your account portal and control which two are active at any time.
Are updates included?+
Minor updates and bug fixes are always free. Major version upgrades (e.g. RootControl 2.0) are paid — with a significant discount for existing license holders.
Is there a free trial?+
Yes — a fully functional trial is available. Try every feature before you buy.
What does the Root Key selector do?+
It aligns each band's EQ center frequency to the harmonic octaves of your track's root key. Every boost and cut becomes musically aware — no guesswork, no clashing frequencies, just surgical harmonic control.
What is the refund policy?+
Refunds are available within 14 days of purchase if the license has not been activated. We recommend using the free trial before purchasing.